Electronic Science and Technology ›› 2019, Vol. 32 ›› Issue (9): 65-71.doi: 10.16180/j.cnki.issn1007-7820.2019.09.014

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Imaging Method for Bistatic Forward-Looking High-speed Maneuvering-platform SAR Based on Series Reversion

ZHANG Aili1,MENG Ziqiang2   

  1. 1.Institute of NBC Defence, PLA, Beijing 102200,China
    2.AVIC Leihua Electronic Technology Institute,Wuxi 214063,China
  • Received:2018-11-20 Online:2019-09-15 Published:2019-09-19
  • Supported by:
    China Postdoctoral Science Foundation(2018M642249);Jiangsu Planned Projects for Postdoctoral Research Funds(2018K008A)


BFHM-SAR is a new and special imaging mode, which performs 2D imaging during the whole terminal diving period of high speed maneuvering platform. In the BFHM-SAR, the transceiver platform moves along different curve trajectories and has great velocities and accelerations, which leads to the problem of high-order terms under the double root and more serious range cell migration in the double-base distance history. In addition, this configuration has a more serious distance migration problem than monostatic or bistatic SAR. This study firstly corrected the range walk in time domain to reduce the two dimensional coupling, and then derived the two-dimensional frequency spectrum by the method of series reversion based on the accurate approximation of slant range in high order. The remaining rang cell curvature was corrected in range frequency azimuth Doppler domain and the high resolution imaging was completed after the pulse compression in both range and azimuth directions. In addition, focus depth in azimuth direction in this special configuration was analyzed in detail. Finally, the validity and feasibility of the proposed approach were verified with the simulation results.

Key words: synthetic aperture radar, bistatic forward-looking, high speed maneuvering platform, range cell migration, focus depth, series reversion

CLC Number: 

  • TN957